$(document).ready( function() {
	date = new Date();
	timestamp = date.getTime();
	in20min = timestamp + ( $('#session_time').val()/60 * 60 * 1000 );
	date.setTime(in20min);
	$('#countdown').attachCountdown({
		until: date, 
		compact: true,
		description: '',
		onExpiry: liftOff
	});
})

function liftOff()
{
	window.location = $('#base_url').val() + '/index/logout';
}